Online Tuning Method of Stator and Rotor resistances in both of Motoring and Regenerating Operations for Vector Controlled Induction Machines

Modeling and Experimental Verification of ANN Based Online Stator Resistance Estimation in DTC-IM Drive

“…The second category of the stator resistance estimation schemes is the most frequently used which includes estimators where value of stator resistance is updated through the adaptive mechanism [14][15][16][17][18][19][20][21][22][23][24].For this purpose integral (I) or proportional-integral (PI) controllers are being used. In principle, different two subgroups exist.…”

“…In this field extended kalman filter is mostly used because of its robustness and also it requires less number of PI controllers [26,27]. In model reference adaptive system (MRAS) [14,15,18,21,24,28] error quantity selection is more diverse. The method addressed in [14] operates in the rotating coordinate system and error determination is accomplished with difference between d-axis rotor flux obtained from voltage and current models.…”

“…The method proposed in [15] is almost same but it uses rotor flux reference and one model is used to determine d-axis component of rotor flux to form the error. Error signal in [24] is mainly based on the active power but in [18] it is found as the sum of the products of rotor flux and rotor current d and q-axis components. Error signal of [21] uses an error in d-axis stator current component as input of integral controller, while error signal of [22] is obtained in such a way that identification of stator resistance is totally independent of leakage inductance.…”